hi all, Thanks for all the replies. as pointed out by Eric brunson i was referring to the following document http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Cluster_Logical_Volume_Manager/mirrorrecover.html i used the below command to simulate failed sda and then wrote some data to the mounted file system to trigger LVM conversion to linear mode. # echo offline > /sys/block/sda/device/state thanks to all. regards -yogeen --- On Thu, 16/4/09, Takahiro Yasui <tyasui@redhat.com> wrote: > From: Takahiro Yasui <tyasui@redhat.com> > Subject: Re: Simulating LVM Mirror Failure and recovery > To: "LVM general discussion and development" <linux-lvm@redhat.com> > Date: Thursday, 16 April, 2009, 9:32 PM > malahal@us.ibm.com > wrote: > > I usually run "echo 1 > > /sys/block/sda/device/delete" to make /dev/sda > > disappear and fail for LVM tests. You can fail the > disk in a lot of ways > > depending on your hardware, but this trick works with > almost every > > device! > > # echo offline > /sys/block/sda/device/state > > might work as well. In this case, you can recover the > failure by > > # echo running > /sys/block/sda/device/state > > Thanks, > Taka > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > Add more friends to your messenger and enjoy! Go to http://messenger.yahoo.com/invite/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
